implement the function isValidPhoneNumber() in the getNewEmployeeCredentials() function.

src/createEmployeeAccount.c

@@ -179,11 +179,17 @@ void getNewEmployeeCredentials()
 
             printf("\n\nplease enter your Phone number\n");
             scanf(" %[^\n]s",data->phoneNumber);
-
-            createNewEmployee(employeeId,employeePassword) ?
-                printf("\n\n Account created successfully !\n\n") :
-                printf("\n\n Could not create the Account please contact an employee of clearance 1 !\n\n");
-            storeEmployeeData(data->firstName,data->lastName,data->address,data->phoneNumber);
+            if(isValidPhoneNumber(data->phoneNumber))
+            {
+                createNewEmployee(employeeId,employeePassword) ?
+                    printf("\n\n Account created successfully !\n\n") :
+                    printf("\n\n Could not create the Account please contact an employee of clearance 1 !\n\n");
+                storeEmployeeData(data->firstName,data->lastName,data->address,data->phoneNumber);
+            }
+            else
+            {
+                printf("\nInvalid phone number!\n");
+            }
         }
         else
         {